lkml.org 
[lkml]   [2022]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v8 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties
On Mon, Mar 21, 2022 at 07:51:32PM +0800, Axe Yang wrote:
> Extend interrupts and pinctrls for SDIO wakeup interrupt feature.
> This feature allow SDIO devices alarm asynchronous interrupt to host
> even when host stop providing clock to SDIO card. An extra wakeup
> interrupt and pinctrl states for SDIO DAT1 pin state switching are
> required in this scenario.
>
> Signed-off-by: Axe Yang <axe.yang@mediatek.com>
> ---
> .../devicetree/bindings/mmc/mtk-sd.yaml | 23 ++++++++++++++++++-
> 1 file changed, 22 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> index 297ada03e3de..f57774535a1d 100644
> --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> @@ -69,12 +69,23 @@ properties:
> - const: ahb_cg
>
> interrupts:
> - maxItems: 1
> + description:
> + Should at least contain MSDC GIC interrupt. To support SDIO in-band wakeup, an extended
> + interrupt is required and be configured as wakeup source irq.
> + minItems: 1
> + maxItems: 2
>
> pinctrl-names:
> + description:
> + Should at least contain default and state_uhs. To support SDIO in-band wakeup, dat1 pin
> + will be switched between GPIO mode and SDIO DAT1 mode, state_eint and state_dat1 are
> + mandatory in this scenarios.
> + minItems: 2
> items:
> - const: default
> - const: state_uhs
> + - const: state_eint
> + - const: state_dat1
>
> pinctrl-0:
> description:
> @@ -86,6 +97,16 @@ properties:
> should contain uhs mode pin ctrl.
> maxItems: 1
>
> + pinctrl-2:
> + description:
> + should switch dat1 pin to GPIO mode.
> + maxItems: 1
> +
> + pinctrl-3:
> + description:
> + should switch SDIO dat1 pin from GPIO mode back to SDIO mode.

How is this different than pinctrl-0?

> + maxItems: 1
> +
> assigned-clocks:
> description:
> PLL of the source clock.
> --
> 2.25.1
>
>

\
 
 \ /
  Last update: 2022-03-22 00:30    [W:0.057 / U:0.324 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site